Table 1.
Characteristics for all subjects at the time of cardiac arrest.
| Chest Compression Rate Categories |
||||
|---|---|---|---|---|
| All Subjects n = 222 |
100-120 n = 21 |
121-140 n = 96 |
>140 n = 105 |
|
| Age [years (SD)] | 66 (14) | 63 (18) | 64 (15) | 68 (13) |
| Female gender [n (%)] | 86 (39) | 6 (29) | 37 (39) | 43 (41) |
| Pre-existing comorbidities [n (%)] | ||||
| Diabetes | 85 (38) | 5 (24) | 33 (34) | 47 (45) |
| Known coronary artery disease | 82 (37) | 4 (19) | 35 (36) | 43 (41) |
| Hypertension | 140 (63) | 10 (48) | 58 (60) | 72 (69) |
| Malignancy | 58 (26) | 5 (24) | 24 (25) | 29 (28) |
| Renal insufficiency | 60 (27) | 3 (14) | 23 (24) | 34 (32) |
| Pulmonary disease | 48 (22) | 4 (19) | 21 (22) | 23 (22) |
| Cerebral vascular disease | 26 (12) | 2 (10) | 11 (11) | 13 (12) |
| Congestive heart failure | 48 (22) | 4 (19) | 19 (20) | 25 (24) |
| Charlson comorbidity score19
[median (IQR)] |
2 (1 - 4) | 1 (0 - 4) | 2 (1 - 4) | 3 (1 - 4) |
| Pre-arrest Cerebral Performance Category [median (IQR)] |
1 (1 – 3) | 1 (1 – 3) | 1 (1 – 3) | 2 (1 – 3) |
| Initial arrest rhythm [n (%)] | ||||
| PEA/asystole | 165 (74) | 15 (72) | 76 (79) | 74 (70) |
| VF/VT | 46 (21) | 3 (14) | 15 (16) | 28 (27) |
| Unknown | 11 (5) | 3 (14) | 5 (5) | 3 (3) |
| Etiology of cardiac arrest [n(%)] | ||||
| Cardiac | 29 (13) | 4 (19) | 12 (13) | 13 (12) |
| Respiratory | 68 (30) | 6 (28) | 27 (28) | 35 (33) |
| Other* | 37 (17) | 1 (5) | 22 (23) | 14 (13) |
| Unknown | 88 (40) | 10 (48) | 35 (36) | 43 (41) |
| Witnessed cardiac arrest | 202 (91%) | 18 (86) | 86 (90) | 98 (93) |
| Arrest Location [n (%)] | ||||
| Monitored bed | 154 (69) | 19 (90) | 70 (73) | 65 (62) |
| Endotracheal intubation [n (%)] | ||||
| Pre-cardiac arrest | 100 (45) | 8 (38) | 44 (46) | 48 (46) |
| Intra-cardiac arrest | 95 (43) | 9 (43) | 40 (42) | 46 (44) |
| Chest compression fraction [median (IQR)] |
91 (87 - 94) | 91 (87 - 95) | 92 (88 - 94) | 90 (87 - 93) |
*
Etiology of cardiac arrest determined not to be cardiac or respiratory; IQR, interquartile range; PEA, pulseless electrical activity; SD, standard deviation; VF, ventricular fibrillation; VT, ventricular tachycardia